Main Reaction: Butyryl-CoA + NADH2 >> Butyraldehyde + NAD

Reference: PubMed ID: 22202963
Authors: Venkataramanan KP, Boatman JJ, Kurniawan Y, Taconi KA, Bothun GD, Scholz C
Title: Impact of impurities in biodiesel-derived crude glycerol on the fermentation by Clostridium pasteurianum ATCC 6013.
Published: 2012 Feb

Butyryl-CoA + NADH2 --> Butyraldehyde + NAD